docs: sync the feature branch workflow with atgc 0.15

docs(helm-force): drop reference to a function that doesn't exist

docs(deploy): fix "three files" header contradicted by its own list

docs(helm-mcp): fix BTreeSet count in vocabulary() doc comment

docs(helm-wasm): correct chunk count from six to seven in comment

docs(readme): fix total unit count from 10,896 to 10,988 for --all-types

docs: fix stale helm_library_loadout references

docs: fix stale MCP tool count in TODO.md

feat(unit-search): an agent can rank a search the way a browser does

fix(forces): fail on a missing AWS session before the download, not after

fix(forces): fail on a missing AWS session before the download, not after

feat(forces): deploy takes a MegaMek version, not a prepared dump

feat(forces)!: carry the force tree across the wasm boundary

fix(forces): one unit is not 1 units

feat(unit-library): fetch the release this repo is pinned against